Well, it's not perfect but at least it's an acceptable solution. Because I can see Charles trying to contact her over and over in the next 30 years or so, to no avail, until he accepts that there's nothing else he can do - or at least he has to learn to live in a new reality in which Raven isn't part of his life anymore, that she's gone forever.

And maybe there are moments in the triolgy that we never got to see, when Charles is looking longingly at an old photo of a blond girl and his younger self.

aww, thats a beautiful scenario.

your explanation seems pretty natural to me. They can easily connect FC to OTrilogy easily, with that idea of Emma erasing Ravens memory of Charles and Charles missing Raven during the next decades until the day he accepted that she is gone forever.

Just because the trilogy didnt show Charles caring about Raven doesnt mean he doesnt. All the characters have many feelings, the movies cant show them all. And they can always develop them in future sequels, if they want too.